Volume of products that can be generated by a production plant or enterprise in a given period by using current resources.
because they have less resources to produce more..
peak
The percentage changes according to many other factors, competency, conditions etc
Growth hormones is really the only thing you can "feed" a cow to increase milk production. Other than that she is on her own, so long as you properly feed her a good diet that keeps her dietary needs...
Sperm production is the creation of sperm in the testies of the bull. Ovum production is the creation of eggs in the ovaries of the cow.